Wheel.



A. MGKILLOP.

WHEEL.

APILIOATIOH FILED DEC. 6, 1911.

. f 2 0 4 M @Q 11 0L T/ V 1, m u 3 6 0. mM u m W d i m n m 3 fi v P.

WITNESSES ATTORNEYS To all whom it "my concern:

UNITED STATES PATENT OFFICE.

ANDREW MGKILLOP, OF DOWNIEVILLE, CALIFORNIA.

WHEEL.

Specification of Letters P n Patented Dec.31,1912.

Application filed December 6, 1911; Serial No. 664,151.

Be it known that I, ANDREW McKiLmr, a citizen of the United States, anda resident of Downieville, in the county of Sierra, State of California,have invented a new and useful Improvement in iVheels, of which thefollowing is a specification.

' My invention is an improvement in' wheels ,-and has for its object theprovision of a simple, strong, light weight wheel wherein is provided a'pneumatic cushion between tlie'spindle and the tread pifitected on allsides. from external injury, and imparting to the wheel a. great amountof resiliency, while of small size and inexpensive.

In the drawings: Figure 1 is a side view of the wheel; Fig. 2 is asimilar view, with the side plate removed; Fig. 3 is a vertical sectioninthe plane of the wheel;- Fig. 4; is a vertical section transverse tothe plane of the wheel; Fig. 5 is a front view of one flange of the hub;and Fig. 6 is a section on the line 6-6 of Fig. 1. In the presentembodiment of the dnven- 'tion the spindle 1 oft-the wheel is providedwith an annular rigid collar 2 atv the inner side of the wheel, and anut 3 en ages the opposite-end of the spindle outside of the wheel. Thewheelgconsists of a casing composed of a disk 4 having a lateralmarginal flange 5 and a cover plate 6. The flange 5 is convex from sideto vside of the wheel to Lform a suitably shaped tread, and the edge ofthe flange remote from the disk is flanged inwardly, as shown at 7, andtli'e'edge of the cover plate tits against the said flange 7. The plate-6 is provided wit-h a series of air outlets and with a central opening 9for the spindle.

A hub 10 is arranged on the spindle, the

said hub having a flange 11 at the end adjacent to disk 4, and a flangeIZat the opposite f end of smaller radius than flange 11. The

at the spindle, and the-opening 1 disk 4 is provided with acentralopening 13 3 is crwered by a cover plate-14 secured to the disk by]bolts 15. The disk l is il QIJHOVlded witlt a series. of air iiilet o1'c 'u'gs it rat-hot out or nozzle,

direct ion to the movement of the wheel. shield. lll'lllt shape of aseiuiruaailar plate 17 is arranged in front of each opening. the

curved edge of the plate being secured to t lie'face ot the disk bylH'ClS 13. Each shield is cupped outwardly, and e -screen 19 i of gauzeextends between the free edge of each shield and the disk 4. second hub21 encircles the spindle adjacent toi the collar, and the opposite endof the hub from the collar is received in a recess 2-2 in the end of hub10. A packing 23 is' arranged in hub 21, and the said hub is providedwith 1 three-radial arms 20, the arms being-arranged adjacent to theplate 6 and being at angles of 120 with respect to/euch other.

' Each arm 20 extends to a point adjacent, to flange 5 and is then bentlaterally toward disk 4, and thence inward toform an arm 7 24substantially parallel with arm 20 and; .spaced apart therefrom. Thefree inner ends of arms 24' are connected by'a ring 25, each arm beingsecured to the ring by rivets or bolts 26, and the ring'is concentricwith the spindle. i

A stub shaft or bolt 26 is journaled parallel with the spindle in eachpair 2024 of arms, and a nut 27 engages each bolt outside of arm 2+1. Awheel is journaled on each g0 bolt, and each wheel is composed of a disk28 having a hub 29 encircling the bolt and p'xtend ing on each side ofthe disk. A rim 30 is arranged on each disk, each rim having on itsinner face and at its transversecenter 35 a pair of spaced ribs 31between wltrch the. edge of the disk is received. The rim ex- 7 tendsbeyond'both faces of the .disk and is slightlyfconvex froin'sideto'side,' and a v packing is arranged in the hub between 00 t-he sameand the bolt. -Each'of the wheels,

composed of disk 28, hub 29 andrim 30,.engages at its inner side theouters urface of :1 pneumaticcushion 33 of annular form seat-' ed on arim 34 between ribs 35 and 35, one at each side'ot' the rim.

The ribs 35 and 35 are as before stated on the rim 3- and flanges 41 and4-2 are integral with the said riin, the said flanges be- ,ing atopposite edges of the rim. and extending radially with respect to therim in opposite direction. The flange 41 extends nwardly toward thespindle 1, while-the flange 42 extends outwardlv toward the tread. andthOJZree edge of the said flange. is ottset laterally initLsecured tothe inner "are of the disk 4. as iihlicatcd zit-43. The flange 4-1 andthe disk tare connected by 3 lie-Its -38. and tilt flanges 11 and 12 (itthe dial slots 44 at each of the bolts, for permitting the movement ofthe bolts'radially with respect to the hub. 7 he spindle 1, the hub 10and the arms 20, may thus move radially toward the pneumatic tire withinlimits prescribedby the diameter of the opening or slots 44. Valves 36are-provided for inflating the cushion, and one of the ribs 35 isprovided with a radial flange 37 fitting outside of flange 12, and bolts38 are passed through.

flange 37, flange 12 and flan e11 parallel with the spindle. The flangeI1 is provided with open1ngs 39 and with a central opening 40 for hub 10(Fig. 5).

In operation, the flange 5 is the tread of the wheel, and when anyportion of the said tread is inengagement *with the ground the-'spi'ndl'e is supported by the wheels 28-2930 with the'pneumaticcushion-be-1 tween the said wheels and the hubof the 1 spindlar Thethree wheels.;prevent dislocation of the pneumatic tire or cushion, and.-the spindle .is plwaiys perfectly cushioned b the tire.- The-wheel hasthusall the -a vanta es of the pneumatic cushion without any-o thedisadvantages. .The tire is per- .fectlyprotect'ed" from any kind ofinjury.

The wheel is'easily and quickly assembled and'ma'y be of any desiredweight and size. -The interior of the wheel is provided with through theopenings 16 and passing out .through openings 8. The arrangement of theshield 17 insures a circulation, since they 7 are arranged wit-h theopen side of the shield forward, and.the air .is scooped up by theshields and passed through the openingslfi. In use, when the tread 5 ofthe wheel engages. the ground, the spindle and the wheels supportedon'the arms 20 may move with respect to the pneumaticltire supported by thedisle t, this movement being permittedbythe slots 44. The tire is fixedwith respect to the disk 4, by means of the ring 42 before mentioned,the said ring holding the tire rigidly in place with respect to'thedisk. Three'points of suspension areprothe said wheels. The resiliencmatic tire is thus obtained wit out any dancasing having one S e op n, P}1; for the side, said leasing having a central vided, namely, thewheels'om the arms 20 and whatever, the position of the wheel thepneumatic tire will always be supported by of the pneutirely protectedby the. casing.

I claim: r v 1. A wheel comprising a hollow metallic ger of puncture,since the said tire is entransverse opening a spindle in the opening, acover for t e opening at the outer face of the wheel, a hub on thespindleprovided ateach end ith a radialflange and at its inner end wgtha longitpdinal recess, a hubionth'e spmd e in the recess,-arins'ex- I oo k a constant circulation of fresh air entering tending radially fromthe last named hub,

each arm being bent back upon itself. in

spaced relation at its outer end, a ring concentric with the wheelconnecting the inwardly bent ends, a bolt connecting each arm with thereturn portion thereof, a disk having a hub journaled on each bolt, arim on the disk extending beyond} each face thereof, an annularpneumatic cushion engaging the inner sides of the wheel, and a rimconnected to the flanges of the first named hub for limited eccentricmovement with respect to the hub, said rim having'a seat for thecushion.

2. A wheel comprising a hollow metalliccasing having-,.one side open, acover plate for the side, said casing having a central transverseopening,'a spindle in the opening, a cover'for the opening at the outerface of the wheel, a hub on the spindle provided at each end with aradial flange and at its inner end with a longitudinal recess, a

hub onthe spindle in the recess, arms extending radially from the lastnamed hub,

each arm being bent back' upon itself in spaced relation at- .its outerend, a ring.

concentric with thewheel connecting the inwardly bent ends, awheelj'ournaled be tween each arm and the return portion on an ing, a coverfor the opening at the outer face of the wheel, a hub on the spindleprovided at each end with -a radial flange and at its inner end with alongitudinal recess, I

a hub on the spindle in the recess, arms extending radially from thelast named hub,

each arm. being bent back u on itself in spaced relation at its outer ena ring con centric with the wheel connectin wardly'bent ends, a wheeljournale between each arm and the return portion on an axis parallel tothe spindle, an annular pneuthe inmatic cushion engaging the inner sidesof the'wheels, a rim connected to theflanges 'of the first magned hub.for limited eccentric movement'withsrespect to the hub, said rim having4.

a seat for the cushion.

casing having one side open, a'cover-plate for the side, said casinghavinga central transverse opening, a spindle in the open-"- ing, acover for the opening at the outer, face wheel comprising a hollowmetallic of the wheel, a hub on the spindle provided at each end witharadialflangeand at its inner end with a longitudinal recess, ahubQnthespindIe in the recess, arms extending 'necte'd movement withrespect to the hub, an annution at its outer end, a ring concentricwith.

the wheel connecting the inwardly bent ends, a wheel journaled betweeneach arm.

and its return portion on an axis parallel to the spindle, a rimconnected to the flanges of the first named hub for limited eccent-ricmovement with respect to the hub, and an annular cushion seated on therim and engaged by the wheels.

5. A wheel comprising a central transverse opening, opening, a hub on tothe hub for limited eccentric casing having a" a spindle in the larpneumatic cushion seated on the rim, a second hub on the spindleprovided with spaced radial arms, each arm having a return portion atits outer end spaced apart from the arm, a ring concentric with thewheel connecting the said portions, a wheel journaled between eacharm'and its return portion on an axis parallel to the spindle,

each Wheel engaging the cushion.

,a central transverse opening,

the spindle, arim con- 6. A wheel comprising a casing having a centraltransverse opening, a spindle in the opening, a hub on the spindle, arim connected to the hub forlimited eccentric movement with respect tothe hub, an annular pneumatic cushion seated. on the rim, a second hubon the spindle provided with spaced radial arms, a wheel journaled oneach arm on an axis parallel ing the cushion.

7. A wheel comprising a casing having a spindle'in the opening, aplurality of hubs on the spindle, a rim connected to one of the hubs forlimited eccentric movement with're'spect to the hub, an annularpneumatic ciishion onthe rim, the other hub having spaced radial. arms,and a wheel arm on an axis parallel to the spindle and engaging thecushion.

- ANDREW McKILLOP.

Witnesses:

THOMAS E. EDWARDS,

LEEROY JEFFREY.

to the spindle and engagi 35- journaled on each i

